/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.catalina.startup;

import org.apache.catalina.Executor;
import org.apache.catalina.Service;
import org.apache.catalina.connector.Connector;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.tomcat.util.IntrospectionUtils;
import org.apache.tomcat.util.digester.Rule;
import org.xml.sax.Attributes;

import java.lang.reflect.Method;

/**
 * Rule implementation that creates a connector.
 */

public class ConnectorCreateRule extends Rule {

	private static final Log log = LogFactory.getLog(ConnectorCreateRule.class);
	// --------------------------------------------------------- Public Methods

	/**
	 * Process the beginning of this element.
	 *
	 * @param namespace  the namespace URI of the matching element, or an
	 *                   empty string if the parser is not namespace aware or the element has
	 *                   no namespace
	 * @param name       the local name if the parser is namespace aware, or just
	 *                   the element name otherwise
	 * @param attributes The attribute list for this element
	 */
	@Override
	public void begin(String namespace, String name, Attributes attributes)
			throws Exception {
		Service svc = (Service) digester.peek();
		Executor ex = null;
		if (attributes.getValue("executor") != null) {
			ex = svc.getExecutor(attributes.getValue("executor"));
		}
		Connector con = new Connector(attributes.getValue("protocol"));
		if (ex != null) _setExecutor(con, ex);

		digester.push(con);
	}

	public void _setExecutor(Connector con, Executor ex) throws Exception {
		Method m = IntrospectionUtils.findMethod(con.getProtocolHandler().getClass(), "setExecutor", new Class[]{java.util.concurrent.Executor.class});
		if (m != null) {
			m.invoke(con.getProtocolHandler(), new Object[]{ex});
		} else {
			log.warn("Connector [" + con + "] does not support external executors. Method setExecutor(java.util.concurrent.Executor) not found.");
		}
	}

	/**
	 * Process the end of this element.
	 *
	 * @param namespace the namespace URI of the matching element, or an
	 *                  empty string if the parser is not namespace aware or the element has
	 *                  no namespace
	 * @param name      the local name if the parser is namespace aware, or just
	 *                  the element name otherwise
	 */
	@Override
	public void end(String namespace, String name) throws Exception {
		digester.pop();
	}


}
